Hybrid layered crystal comprising polyoxometalate and surfactant synthesized from reduced mo-blue species

A hybrid layered crystal containing polyoxomolybdate was successfully synthesized from reduced mo-blue species as starting material. the hybrid crystal,[c5h5n(c16h33)] 2[ β -h2mo8o26] · 2c2h5oh (c16py-h2mo8),was obtained as a single phase by the gradual oxidation of hexadecylpyridinium- mo-blue (c16py-mo-blue) hybrid. the x-ray structure analysis revealed that c16py-h2mo8 comprised β -type octamolybdate anion with two protons (β -h2mo8). the β -h2mo8 anions and ethanol molecules of crystallization formed two-dimensional anionic layers. the pyridine rings of c16py did not attend to form the two-dimensional inorganic layers,and the interdigitated c16py bilayers were sandwiched by the β -h2mo8 anionic layers with periodicity of 18.2 å. these c16py-h2mo8 hybrid layered crystals possibly work as a new class of proton conductor. © 2013 keisuke mikurube et al.